JSFiddle - React, Tailwind, and code Playground

HTML

<ol>
        <li>First</li>
        <li>Second</li>
        <li>Third</li>
</ol>

CSS

li {
position: relative;
}
li:before {
content: "";
width: 15px;
height: 15px;
position: absolute;
right: -40px;
background: url(http://www.hadley.edu/images/RightTriangleIcon.png);
background-size: contain;
}